Improvement in pitmen



UNITED STATES PATENT FFICE. i

g JOHN r. sEiBEHLINe, or AKRON, OHIO.

IMPROVEMENT IN PITMEN.

Specification forming part of Letters Patent No. 147,436, dated February10, 1874-; application filed January 27, 1874.

To all -whom it may concern:

Be it known that I, JOHN F. SnrBnnLrNG, of Akron, in the county ofSummit and State of Ohio, have invented a new and useful Improvement inPitmen, of which the following is a specification, reference being hadto the accompanying drawings, which make part of this specification, andin which- Figure l represents a View in perspective of my improvedpitman, part of the rod being broken away; and Fig. 2 a sectional Viewof the pitman-head.

The object of my invention is to so construct the crank-pin box of thepitman-head that it may be adjusted to compensate wear, so a-s always toit snugly; and my improvement consists in combining a pitman-rod havinga screw out thereon, a yoke or slotted holder with a female screwtherein, anda transverselyslotted spring-head or cut ring bearingagainst the yoke, and adjusted therein by means of the screw-threadedrod.

The crank-pin box of the pitman-head is peculiarly constructed. Theupper end of the pitman-rod A carries a transversely-slottedspring-head, B, which ts on the crank-pin. A male screw, G, on the`pitmanrod passes through a corresponding female screw on a stirrup oryoke, D, whichA incloses the spring head B. This spring-head fits on'the end of the pitman-rod.

Now, by screwing up the pitman-rod, the spring-head will-be jammedagainst the yoke, and thus be compressed on the crank-pin, andcompensate :its Wear.

Jam-nuts E E hold the pitman and springhead in place when screwed up.

In a fullsized pitman, the spring head readily plays enough toaccommodate this adjustment.

I claim as my invention- The combination of the pitman, the yoke, andthe slotted spring-head, all constructed and operatin g substantially asset forth.

In testimony whereof I have hereunto subscribed my name.

JOHN F. SEIBERLING.

Witnesses:

H. J. BARTON, J. M, POULsoN.

